19742789738 has 8 divisors (see below), whose sum is σ = 33844782432. Its totient is φ = 8461195596.

The previous prime is 19742789719. The next prime is 19742789761. The reversal of 19742789738 is 83798724791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705099620 + ... + 705099647.

It is an arithmetic number, because the mean of its divisors is an integer number (4230597804).

Almost surely, 2^19742789738 is an apocalyptic number.

19742789738 is a deficient number, since it is larger than the sum of its proper divisors (14101992694).

19742789738 is a wasteful number, since it uses less digits than its factorization.

19742789738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410199276.

The product of its digits is 42674688, while the sum is 65.

The spelling of 19742789738 in words is "nineteen billion, seven hundred forty-two million, seven hundred eighty-nine thousand, seven hundred thirty-eight".